US6932045B2 - Cylinder block for an internal combustion engine - Google Patents
Cylinder block for an internal combustion engine Download PDFInfo
- Publication number
- US6932045B2 US6932045B2 US10/994,736 US99473604A US6932045B2 US 6932045 B2 US6932045 B2 US 6932045B2 US 99473604 A US99473604 A US 99473604A US 6932045 B2 US6932045 B2 US 6932045B2
- Authority
- US
- United States
- Prior art keywords
- camshaft
- profiled section
- cylinder
- cylinder block
- vertical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0043—Arrangements of mechanical drive elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0002—Cylinder arrangements
- F02F7/0007—Crankcases of engines with cylinders in line
Definitions
- the invention relates to a cylinder block for an internal combustion engine having a plurality of cylinders with profiled sections in the area of a plane of a main crankshaft bearing structure.
- Patent DE 43 24 609 C2 discloses a cylinder block for an internal combustion engine having a plurality of cylinders and lateral reinforcing structures in the form of longitudinal and vertical profiled sections. These hollow profiled sections are integrated in the casting forming the cylinder block. A plurality of longitudinal profiled sections are provided laterally, and a vertical profiled section is provided at each main bearing, the longitudinal profiled sections extending in the longitudinal direction of the engine and the vertical profiled sections following the profile of the side wall of the cylinder-crankcase, i.e. from the top initially parallel to the cylinder axis and then widening outward in the region of the crank case.
- the cavities of the profiled sections are designed such that medium can flow through them continuously.
- a cylinder-block having a reinforcing structure of longitudinal and vertical profiled sections in which a lateral camshaft can be mounted in close proximity to the cylinder walls.
- a cylinder-block for an internal combustion engine with a plurality of cylinders having longitudinal profiled sections in the form of lateral hollow reinforcement structures and vertical sections in the form of profiled reinforcement structures, in the region of a main bearing plane means are provided for supporting a lateral camshaft beneath the upper longitudinal profiled section, and, in the region of the bearing structure for the camshaft the vertical profiled section is divided in two.
- the longitudinal profiled sections extending in the longitudinal direction of the engine and the vertical profiled sections following the profile of the side wall of the cylinder block, i.e. starting from the top, initially parallel to the cylinder and then outwardly in the region of the crank space. If the lateral camshaft is mounted beneath the longitudinal profiled section, that is next to the longitudinal profiled section, a narrow engine design can be achieved since the camshaft does not significantly increase the width of the internal combustion engine. However, the level where the camshaft is positioned i.e. the vertical position of the camshaft is predetermined thereby.
- the vertical profiled section is interrupted if the camshaft is arranged beneath a longitudinal profiled section.
- the vertical profiled sections are disposed in the plane the bearings of the camshaft, which are also the main crankshaft bearing planes. These planes are perpendicular to the longitudinal direction of the engine and extend in each case between two cylinders.
- the vertical profiled section is divided in two in the region of the camshaft bearings, so that a continuous flow connection with as far as possible a constant cross section is obtained and therefore a uniform or symmetrical loading on the high profiled section occurs in the event of bending or torsion of the cylinder-block.
- the camshaft alley i.e. the space in which the camshaft is disposed, can likewise be designed as a longitudinal profiled section and therefore constitutes a second longitudinal profiled section beneath the upper longitudinal profiled section. In this way, a single casting core can be used to produce the reinforcing structure comprising high and longitudinal profiled sections, which results in considerable advantages in terms of manufacturing costs and the quality or tolerance of the positioning of the individual casting cores with respect to one another.
- a partial portion of the divided vertical profiled section is arranged in front of the bearing arrangement of the camshaft and a partial portion is arranged behind the bearing arrangement of the camshaft, as seen in the longitudinal direction of the engine.
- the vertical profiled section forms at least an upper and a lower cavity by closure elements.
- closure elements make it easy for the cavities of the longitudinal and vertical profiled sections to be divided into two separate portions in order for different media to be routed therein without, however, losing the advantage of a common casting core which is simple to produce and allows accurate blank castings to be produced on account of its inherent stability.
- coolant can flow through an upper longitudinal profiled section and an upper cavity arranged on the opposite side of the cylinder-block from the bearing arrangement for the camshaft.
- the cavity of the reinforcing profiled sections can be ideally utilized as a coolant distributor passage to the individual cylinders, since it extends over the entire length of the cylinder-block and has a virtually constant cross section.
- a supply of coolant which is as uniform as possible is only required on one side of the engine; the coolant leaves the engine for example via the cylinder head.
- a lower cavity of the longitudinal and vertical profiled sections is in communication with an oil space of the cylinder-block and serves as a pressurized-oil supply line or a line for crankcase ventilation.
- elements of a valve operating mechanism are provided in an upper cavity of the vertical profiled section and/or in the longitudinal profiled section. Since the camshaft is mounted in, or beneath, a longitudinal profiled section which is in communication with the upper longitudinal profiled section, i.e. both profiled sections are filled with lubricating oil or oil mist, it is advantageous for these spaces to be used for the actuating elements of the valve operating mechanism, such as for example push rods. This means that the external contour of the internal combustion engine or the crankcase is not significantly increased in size despite the longitudinal profiled sections, vertical profiled sections, a lateral camshaft and the valve operating mechanism.
- FIG. 1 shows a perspective illustration of a cylinder block according to the invention
- FIG. 2 shows in a longitudinal sectional view taken along line II—II of FIG. 1 a camshaft bearing alley
- FIG. 3 shows a perspective illustration of a casting core of the camshaft side of the cylinder block
- FIG. 4 shows a perspective illustration of a casting core of the side of the cylinder block from the camshaft, and opposite the side shown in FIG. 3 , and
- FIG. 5 is a lateral plan view of a casting core of the opposite side of the cylinder block opposite the camshaft.
- FIG. 1 shows a cylinder-block 1 having a plurality of cylinders 2 and a crank space 3 .
- a crankshaft bearing 4 is located between two cylinders 2 .
- a cavity 5 known as the camshaft bearing alley, in which a camshaft (not shown) is mounted, is arranged on the outer side of the cylinder block in the transition area from the upper cylinder part of the cylinder block 1 to the crank space 3 .
- This cavity 5 is formed as a longitudinal profiled section.
- Above this cavity 5 there is a further, upper, longitudinal profiled section 6 which serves to longitudinally reinforce the cylinder block 1 and in particular to reinforce the cylinder cover 7 and is likewise hollow.
- tappets (not shown) of a valve-actuating mechanism are accommodated in this longitudinal profiled section 6 .
- the guides 8 for the tappets and the passages 9 for the push rods are provided in the cylinder-block 1 .
- a reinforcing hollow longitudinal profiled section 10 is likewise arranged at the lower end of the cylinder block.
- Three hollow longitudinal profiled sections 10 ′, 11 , 12 are likewise arranged on the opposite side of the cylinder-block 1 from the camshaft, the longitudinal profiled section 10 being arranged at the lower end of the cylinder-block corresponding to the longitudinal profiled section 10 on the camshaft side. Since neither camshaft nor tappets are provided on this side of the cylinder block, the longitudinal profiled sections 11 , 12 are of simpler design, i.e. are rectilinear without any sudden changes in cross-section.
- a coolant flows from the longitudinal profiled section 11 , which is designed as a coolant distributor passage, into the cooling jacket 14 surrounding the cylinders 2 .
- FIG. 2 shows the cylinder-block 1 according to the invention as shown in FIG. 1 in the form of a longitudinal section through the camshaft bearing alley 5 over one full and two adjacent half cylinders 2 .
- hollow high profiled sections 15 lead via the cavity of the camshaft bearing alley 5 to the lower edge of the cylinder block 1 .
- the vertical profiled sections 15 are arranged in the main bearing plane between two cylinders 2 .
- the camshaft (not shown) is mounted in camshaft bearings 16 , which for their part are connected to the cylinder block 1 by casting structures in front of, and behind, the sectional plane shown in the figure.
- the lubricant for the camshaft is supplied through the bores 17 in the camshaft bearing 16 .
- the tappets (not shown) for actuating the gas exchange valves are guided in the guides 8 and project out of the cylinder-block 1 into the cylinder head (not shown) through the passages 9 .
- the rectilinear profile of the high profiled sections 15 from the longitudinal profiled section 6 to the lower edge of the cylinder block 1 is interrupted by the camshaft bearing alley 5 .
- the vertical profiled sections 15 are divided in two which extend around the camshaft bearings.
- the bearing cavity is formed by one part of the vertical profiled section 15 extending in front of the camshaft bearing 16 , and the other part extending behind the camshaft bearing 16 . This results in a continuous, virtually constant flow cross-section from the top downward.
- FIG. 3 shows the casting core 18 for the reinforcing structure of the cylinder block 1 in a perspective view of the camshaft side as seen from the outside.
- the casting core 18 is composed in particular of the portions for the vertical profiled sections 15 ′ and the longitudinal profiled sections 5 ′, 6 ′, 10 ′.
- the drawing shows cores for the passages 9 ′ and the guides 8 ′ for the valve-actuating devices. Since the guides 8 ′ comprise an integrally cast part which is subsequently drilled, they are formed as a cavity or void in the casting core, which consists, for example, of molding sand.
- FIG. 4 shows the casting core 19 of the reinforcing structure of the cylinder block 1 in the form of a perspective view as seen from the inside toward the side of the cylinder block opposite the camshaft.
- the casting core 19 is composed in particular of portions for the vertical profiled sections 15 ′ and for the longitudinal profiled sections 10 ′, 11 ′.
- the passages 13 ′ for the coolant are arranged at the portion for the upper longitudinal profiled section 11 ′.
- the projections 20 ′ which protrude from the casting core result in apertures in the finished cylinder block 1 .
- they are used to hold and connect the various casting cores to one another, and in the finished cylinder-crankcase form flow passages, for example for transferring coolant from the cylinder block to the cylinder head.
- FIG. 5 shows the casting core 19 of FIG. 4 in a side view from the inside outward in the transverse direction of the engine.
- this figure also shows the transition location 21 from the vertical profiled section 15 ′ to the upper longitudinal profiled section 11 ′.
- the profiled structure comprising longitudinal and vertical profiled sections is cast around a casting core 19 , but the cavities which result from the casting core are divided into two separate cavities by closure elements at the transition location 21 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/994,736 US6932045B2 (en) | 2002-05-23 | 2004-11-22 | Cylinder block for an internal combustion engine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10222757A DE10222757B4 (en) | 2002-05-23 | 2002-05-23 | Cylinder crankcase of an internal combustion engine |
DE10222757.8 | 2002-05-23 | ||
PCT/EP2003/002999 WO2003100239A1 (en) | 2002-05-23 | 2003-03-22 | Cylindrical crankcase for an internal combustion engine |
US10/994,736 US6932045B2 (en) | 2002-05-23 | 2004-11-22 | Cylinder block for an internal combustion engine |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/002999 Continuation-In-Part WO2003100239A1 (en) | 2002-05-23 | 2003-03-22 | Cylindrical crankcase for an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050092282A1 US20050092282A1 (en) | 2005-05-05 |
US6932045B2 true US6932045B2 (en) | 2005-08-23 |
Family
ID=34553269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/994,736 Expired - Fee Related US6932045B2 (en) | 2002-05-23 | 2004-11-22 | Cylinder block for an internal combustion engine |
Country Status (1)
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US (1) | US6932045B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070074696A1 (en) * | 2005-10-05 | 2007-04-05 | Obidi T Y | Alignment feature for casting and method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104812511B (en) * | 2012-11-27 | 2017-03-01 | 卡明斯公司 | Stable electromotor casting core assembly |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1091811B (en) | 1958-08-30 | 1960-10-27 | Hans List Dipl Ing Dr Techn | Piston machine with a crankcase set up to optionally accommodate power and working cylinders |
DE4324609C2 (en) | 1993-07-22 | 1997-10-16 | Avl Verbrennungskraft Messtech | Crankcase for internal combustion engines |
DE19630287A1 (en) | 1996-07-26 | 1998-01-29 | Deutz Ag | Crankcase for IC engine |
AT2109U1 (en) | 1997-04-24 | 1998-04-27 | Avl List Gmbh | INTERNAL COMBUSTION ENGINE WITH A CRANKCASE |
DE29710830U1 (en) | 1997-06-20 | 1998-10-22 | Fev Motorentech Gmbh & Co Kg | Basic housing for a multi-cylinder piston internal combustion engine |
US6129133A (en) | 1998-04-07 | 2000-10-10 | Ford Global Technologies, Inc. | Method for forming a cylinder bore isolator core for casting engine cylinder blocks |
GB2349592A (en) | 1999-05-07 | 2000-11-08 | Perkins Engines Co Ltd | Cylinder block and method of fabrication thereof |
US6216658B1 (en) * | 1998-06-19 | 2001-04-17 | Cummins Engine Company Ltd. | Engine cylinder block with optimized stiffness |
US6575124B2 (en) * | 1999-09-28 | 2003-06-10 | Kubota Corporation | Cylinder block of multi-cylinder engine and process of molding same |
-
2004
- 2004-11-22 US US10/994,736 patent/US6932045B2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1091811B (en) | 1958-08-30 | 1960-10-27 | Hans List Dipl Ing Dr Techn | Piston machine with a crankcase set up to optionally accommodate power and working cylinders |
DE4324609C2 (en) | 1993-07-22 | 1997-10-16 | Avl Verbrennungskraft Messtech | Crankcase for internal combustion engines |
DE19630287A1 (en) | 1996-07-26 | 1998-01-29 | Deutz Ag | Crankcase for IC engine |
AT2109U1 (en) | 1997-04-24 | 1998-04-27 | Avl List Gmbh | INTERNAL COMBUSTION ENGINE WITH A CRANKCASE |
DE29710830U1 (en) | 1997-06-20 | 1998-10-22 | Fev Motorentech Gmbh & Co Kg | Basic housing for a multi-cylinder piston internal combustion engine |
US6129133A (en) | 1998-04-07 | 2000-10-10 | Ford Global Technologies, Inc. | Method for forming a cylinder bore isolator core for casting engine cylinder blocks |
US6216658B1 (en) * | 1998-06-19 | 2001-04-17 | Cummins Engine Company Ltd. | Engine cylinder block with optimized stiffness |
GB2349592A (en) | 1999-05-07 | 2000-11-08 | Perkins Engines Co Ltd | Cylinder block and method of fabrication thereof |
US6575124B2 (en) * | 1999-09-28 | 2003-06-10 | Kubota Corporation | Cylinder block of multi-cylinder engine and process of molding same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070074696A1 (en) * | 2005-10-05 | 2007-04-05 | Obidi T Y | Alignment feature for casting and method |
Also Published As
Publication number | Publication date |
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US20050092282A1 (en) | 2005-05-05 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: DAIMLERCHRYSLER AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RIEGER, ULRICH;REEL/FRAME:016155/0032 Effective date: 20041202 |
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REMI | Maintenance fee reminder mailed | ||
FPAY | Fee payment |
Year of fee payment: 4 |
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SULP | Surcharge for late payment | ||
AS | Assignment |
Owner name: DAIMLER AG, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:DAIMLERCHRYSLER AG;REEL/FRAME:022846/0912 Effective date: 20071019 Owner name: DAIMLER AG,GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:DAIMLERCHRYSLER AG;REEL/FRAME:022846/0912 Effective date: 20071019 |
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REMI | Maintenance fee reminder mailed | ||
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Year of fee payment: 8 |
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SULP | Surcharge for late payment |
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LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.) |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20170823 |